<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>css阴影</title>
    <style>

        .box {
            margin: 100px;
            width: 200px;
            height: 200px;
            background-color: #ffa700;
            /*横向偏移、纵向偏移、虚化程度、放大程度*/
            box-shadow: 0 0 12px 0 rgba(233,234,237,1);

        }
    </style>
</head>

<body>



        <div class="box">
        </div>



</body>

</html>